I have 2 data.frames, the first is a data.frame that contains stock data and a column with a unique identifier (column "ISIN") , as shown below: >
Teste=data.frame(matrix(runif(20), nrow=5, ncol=4))
Teste$ISIN <- c("A1","A2","A3","A4","A5"...
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19.04.2016 / 21:30